The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 06, 1981
Filed:
May. 22, 1979
Applicant:
Inventors:
Kurt Handrick, Essen-Steele, DE;
Georg Kolling, Essen-Bredeney, DE;
Assignee:
Bergwerksverband GmbH, Essen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
2603191 ; 546181 ;
Abstract
Process for making indole by subjecting 1,2,3,4-tetrahydroquinoline to a thermal decomposition at a reaction temperature of about 650.degree. to 750.degree. C. in a reactor filled with a substantially inert material and in the presence of steam. The starting product for this process is easily available and can easily be obtained by chemical reaction and the process itself has a high yield.